binutils-gdb/bfd/elf64-sparc.c

/* SPARC-specific support for 64-bit ELF
   Copyright 1993, 1995 Free Software Foundation, Inc.

This file is part of BFD, the Binary File Descriptor library.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

/* We need a published ABI spec for this.  Until one comes out, don't
   assume this'll remain unchanged forever.  */

#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
#include "elf-bfd.h"

static bfd_reloc_status_type sparc64_elf_wdisp16_reloc
  PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
static boolean sparc64_elf_relocate_section
  PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
	   Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
static boolean sparc64_elf_object_p PARAMS ((bfd *));

enum reloc_type
  {
    R_SPARC_NONE = 0,
    R_SPARC_8, R_SPARC_16, R_SPARC_32,
    R_SPARC_DISP8, R_SPARC_DISP16, R_SPARC_DISP32,
    R_SPARC_WDISP30, R_SPARC_WDISP22,
    R_SPARC_HI22, R_SPARC_22,
    R_SPARC_13, R_SPARC_LO10,
    R_SPARC_GOT10, R_SPARC_GOT13, R_SPARC_GOT22,
    R_SPARC_PC10, R_SPARC_PC22,
    R_SPARC_WPLT30,
    R_SPARC_COPY,
    R_SPARC_GLOB_DAT, R_SPARC_JMP_SLOT,
    R_SPARC_RELATIVE,
    R_SPARC_UA32,

    /* v9 relocs */
    R_SPARC_10, R_SPARC_11, R_SPARC_64,
    R_SPARC_OLO10, R_SPARC_HH22, R_SPARC_HM10, R_SPARC_LM22,
    R_SPARC_PC_HH22, R_SPARC_PC_HM10, R_SPARC_PC_LM22,
    R_SPARC_WDISP16, R_SPARC_WDISP19,
    R_SPARC_GLOB_JMP, R_SPARC_LO7,

    R_SPARC_max
  };

#if 0
static CONST char *CONST reloc_type_names[] =
{
  "R_SPARC_NONE",
  "R_SPARC_8", "R_SPARC_16", "R_SPARC_32",
  "R_SPARC_DISP8", "R_SPARC_DISP16", "R_SPARC_DISP32",
  "R_SPARC_WDISP30", "R_SPARC_WDISP22",
  "R_SPARC_HI22", "R_SPARC_22",
  "R_SPARC_13", "R_SPARC_LO10",
  "R_SPARC_GOT10", "R_SPARC_GOT13", "R_SPARC_GOT22",
  "R_SPARC_PC10", "R_SPARC_PC22",
  "R_SPARC_WPLT30",
  "R_SPARC_COPY",
  "R_SPARC_GLOB_DAT", "R_SPARC_JMP_SLOT",
  "R_SPARC_RELATIVE",
  "R_SPARC_UA32",

  "R_SPARC_10", "R_SPARC_11", "R_SPARC_64",
  "R_SPARC_OLO10", "R_SPARC_HH22", "R_SPARC_HM10", "R_SPARC_LM22",
  "R_SPARC_PC_HH22", "R_SPARC_PC_HM10", "R_SPARC_PC_LM22",
  "R_SPARC_WDISP16", "R_SPARC_WDISP19",
  "R_SPARC_GLOB_JMP", "R_SPARC_LO7",
};
#endif

extern void abort ();
#define DIE	((bfd_reloc_status_type(*)())abort)

static reloc_howto_type elf_sparc_howto_table[] =
{
  HOWTO (R_SPARC_NONE, 0, 0, 0, false, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_NONE", false, 0, 0x00000000, true),
  HOWTO (R_SPARC_8, 0, 0, 8, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_SPARC_8", false, 0, 0x000000ff, true),
  HOWTO (R_SPARC_16, 0, 1, 16, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_SPARC_16", false, 0, 0x0000ffff, true),
  HOWTO (R_SPARC_32, 0, 2, 32, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_SPARC_32", false, 0, 0xffffffff, true),
  HOWTO (R_SPARC_DISP8, 0, 0, 8, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP8", false, 0, 0x000000ff, true),
  HOWTO (R_SPARC_DISP16, 0, 1, 16, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP16", false, 0, 0x0000ffff, true),
  HOWTO (R_SPARC_DISP32, 0, 2, 32, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_DISP32", false, 0, 0x00ffffff, true),
  HOWTO (R_SPARC_WDISP30, 2, 2, 30, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP30", false, 0, 0x3fffffff, true),
  HOWTO (R_SPARC_WDISP22, 2, 2, 22, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP22", false, 0, 0x003fffff, true),
  HOWTO (R_SPARC_HI22, 10, 2, 22, false, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HI22", false, 0, 0x003fffff, true),
  HOWTO (R_SPARC_22, 0, 2, 22, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_SPARC_22", false, 0, 0x003fffff, true),
  HOWTO (R_SPARC_13, 0, 2, 13, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_SPARC_13", false, 0, 0x00001fff, true),
  HOWTO (R_SPARC_LO10, 0, 2, 10, false, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LO10", false, 0, 0x000003ff, true),
  HOWTO (R_SPARC_GOT10, 0, 2, 10, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_SPARC_GOT10", false, 0, 0x000003ff, true),
  HOWTO (R_SPARC_GOT13, 0, 2, 13, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_SPARC_GOT13", false, 0, 0x00001fff, true),
  HOWTO (R_SPARC_GOT22, 10, 2, 22, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_SPARC_GOT22", false, 0, 0x003fffff, true),
  HOWTO (R_SPARC_PC10, 0, 2, 10, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_SPARC_PC10", false, 0, 0x000003ff, true),
  HOWTO (R_SPARC_PC22, 0, 2, 22, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_SPARC_PC22", false, 0, 0x003fffff, true),
  HOWTO (R_SPARC_WPLT30, 0, 0, 00, false, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_WPLT30", false, 0, 0x00000000, true),
  HOWTO (R_SPARC_COPY, 0, 0, 00, false, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_COPY", false, 0, 0x00000000, true),
  HOWTO (R_SPARC_GLOB_DAT, 0, 0, 00, false, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GLOB_DAT", false, 0, 0x00000000, true),
  HOWTO (R_SPARC_JMP_SLOT, 0, 0, 00, false, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_JMP_SLOT", false, 0, 0x00000000, true),
  HOWTO (R_SPARC_RELATIVE, 0, 0, 00, false, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_RELATIVE", false, 0, 0x00000000, true),
  HOWTO (R_SPARC_UA32, 0, 0, 00, false, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_UA32", false, 0, 0x00000000, true),
  HOWTO (R_SPARC_10, 0, 2, 10, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_SPARC_10", false, 0, 0x000003ff, true),
  HOWTO (R_SPARC_11, 0, 2, 11, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_SPARC_11", false, 0, 0x000007ff, true),
  HOWTO (R_SPARC_64, 0, 4, 00, false, 0, complain_overflow_bitfield, bfd_elf_generic_reloc, "R_SPARC_64", false, 0, (((bfd_vma) 0xffffffff) << 32) + 0xffffffff, true),
  HOWTO (R_SPARC_OLO10, 0, 2, 10, false, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_OLO10", false, 0, 0x000003ff, true),
  HOWTO (R_SPARC_HH22, 42, 2, 22, false, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HH22", false, 0, 0x003fffff, true),
  HOWTO (R_SPARC_HM10, 32, 2, 10, false, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HM10", false, 0, 0x000003ff, true),
  HOWTO (R_SPARC_LM22, 10, 2, 22, false, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LM22", false, 0, 0x003fffff, true),
  HOWTO (R_SPARC_PC_HH22, 42, 2, 22, true, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HH22", false, 0, 0x003fffff, true),
  HOWTO (R_SPARC_PC_HM10, 32, 2, 10, true, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_HM10", false, 0, 0x000003ff, true),
  HOWTO (R_SPARC_PC_LM22, 10, 2, 22, true, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LM22", false, 0, 0x003fffff, true),
  HOWTO (R_SPARC_WDISP16, 2, 2, 16, true, 0, complain_overflow_signed, sparc64_elf_wdisp16_reloc, "R_SPARC_WDISP16", false, 0, 0, true),
  HOWTO (R_SPARC_WDISP19, 2, 2, 22, true, 0, complain_overflow_signed, bfd_elf_generic_reloc, "R_SPARC_WDISP19", false, 0, 0x0007ffff, true),
  HOWTO (R_SPARC_GLOB_JMP, 0, 0, 00, false, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_GLOB_DAT", false, 0, 0x00000000, true),
  HOWTO (R_SPARC_LO7, 0, 2, 7, false, 0, complain_overflow_dont, bfd_elf_generic_reloc, "R_SPARC_LO7", false, 0, 0x0000007f, true),
};

/* Handle the WDISP16 reloc.  */

static bfd_reloc_status_type
sparc64_elf_wdisp16_reloc (abfd,
			   reloc_entry,
			   symbol,
			   data,
			   input_section,
			   output_bfd,
			   error_message)
     bfd *abfd;
     arelent *reloc_entry;
     asymbol *symbol;
     PTR data;
     asection *input_section;
     bfd *output_bfd;
     char **error_message;
{
  bfd_vma relocation;
  bfd_vma x;

  if (output_bfd != (bfd *) NULL
      && (symbol->flags & BSF_SECTION_SYM) == 0
      && (! reloc_entry->howto->partial_inplace
	  || reloc_entry->addend == 0))
    {
      reloc_entry->address += input_section->output_offset;
      return bfd_reloc_ok;
    }

  if (output_bfd != NULL)
    return bfd_reloc_continue;

  if (reloc_entry->address > input_section->_cooked_size)
    return bfd_reloc_outofrange;

  relocation = (symbol->value
		+ symbol->section->output_section->vma
		+ symbol->section->output_offset);
  relocation += reloc_entry->addend;
  relocation -=	(input_section->output_section->vma
		 + input_section->output_offset);
  relocation -= reloc_entry->address;

  x = bfd_get_32 (abfd, (char *) data + reloc_entry->address);
  x |= ((((relocation >> 2) & 0xc000) << 6)
	| ((relocation >> 2) & 0x3fff));
  bfd_put_32 (abfd, x, (char *) data + reloc_entry->address);

  if ((bfd_signed_vma) relocation < - 0x40000
      || (bfd_signed_vma) relocation > 0x3ffff)
    return bfd_reloc_overflow;
  else
    return bfd_reloc_ok;
}

struct elf_reloc_map
  {
    unsigned char bfd_reloc_val;
    unsigned char elf_reloc_val;
  };

static CONST struct elf_reloc_map sparc_reloc_map[] =
{
  {BFD_RELOC_NONE, R_SPARC_NONE,},
  {BFD_RELOC_16, R_SPARC_16,},
  {BFD_RELOC_8, R_SPARC_8},
  {BFD_RELOC_8_PCREL, R_SPARC_DISP8},
  {BFD_RELOC_CTOR, R_SPARC_32},	/* @@ Assumes 32 bits.  */
  {BFD_RELOC_32, R_SPARC_32},
  {BFD_RELOC_32_PCREL, R_SPARC_DISP32},
  {BFD_RELOC_HI22, R_SPARC_HI22},
  {BFD_RELOC_LO10, R_SPARC_LO10,},
  {BFD_RELOC_32_PCREL_S2, R_SPARC_WDISP30},
  {BFD_RELOC_SPARC22, R_SPARC_22},
  {BFD_RELOC_SPARC13, R_SPARC_13},
  {BFD_RELOC_SPARC_GOT10, R_SPARC_GOT10},
  {BFD_RELOC_SPARC_GOT13, R_SPARC_GOT13},
  {BFD_RELOC_SPARC_GOT22, R_SPARC_GOT22},
  {BFD_RELOC_SPARC_PC10, R_SPARC_PC10},
  {BFD_RELOC_SPARC_PC22, R_SPARC_PC22},
  {BFD_RELOC_SPARC_WPLT30, R_SPARC_WPLT30},
  {BFD_RELOC_SPARC_COPY, R_SPARC_COPY},
  {BFD_RELOC_SPARC_GLOB_DAT, R_SPARC_GLOB_DAT},
  {BFD_RELOC_SPARC_JMP_SLOT, R_SPARC_JMP_SLOT},
  {BFD_RELOC_SPARC_RELATIVE, R_SPARC_RELATIVE},
  {BFD_RELOC_SPARC_WDISP22, R_SPARC_WDISP22},
/*  { BFD_RELOC_SPARC_UA32, R_SPARC_UA32 }, not used?? */
  {BFD_RELOC_SPARC_10, R_SPARC_10},
  {BFD_RELOC_SPARC_11, R_SPARC_11},
  {BFD_RELOC_SPARC_64, R_SPARC_64},
  {BFD_RELOC_SPARC_OLO10, R_SPARC_OLO10},
  {BFD_RELOC_SPARC_HH22, R_SPARC_HH22},
  {BFD_RELOC_SPARC_HM10, R_SPARC_HM10},
  {BFD_RELOC_SPARC_LM22, R_SPARC_LM22},
  {BFD_RELOC_SPARC_PC_HH22, R_SPARC_PC_HH22},
  {BFD_RELOC_SPARC_PC_HM10, R_SPARC_PC_HM10},
  {BFD_RELOC_SPARC_PC_LM22, R_SPARC_PC_LM22},
  {BFD_RELOC_SPARC_WDISP16, R_SPARC_WDISP16},
  {BFD_RELOC_SPARC_WDISP19, R_SPARC_WDISP19},
  {BFD_RELOC_SPARC_GLOB_JMP, R_SPARC_GLOB_JMP},
  {BFD_RELOC_SPARC_LO7, R_SPARC_LO7},
};

static reloc_howto_type *
bfd_elf64_bfd_reloc_type_lookup (abfd, code)
     bfd *abfd;
     bfd_reloc_code_real_type code;
{
  int i;
  for (i = 0; i < sizeof (sparc_reloc_map) / sizeof (struct elf_reloc_map); i++)
    {
      if (sparc_reloc_map[i].bfd_reloc_val == code)
	return &elf_sparc_howto_table[(int) sparc_reloc_map[i].elf_reloc_val];
    }
  return 0;
}

static void
elf_info_to_howto (abfd, cache_ptr, dst)
     bfd *abfd;
     arelent *cache_ptr;
     Elf64_Internal_Rela *dst;
{
  BFD_ASSERT (ELF64_R_TYPE (dst->r_info) < (unsigned int) R_SPARC_max);
  cache_ptr->howto = &elf_sparc_howto_table[ELF64_R_TYPE (dst->r_info)];
}

/* Relocate a SPARC64 ELF section.  */

static boolean
sparc64_elf_relocate_section (output_bfd, info, input_bfd, input_section,
			      contents, relocs, local_syms, local_sections)
     bfd *output_bfd;
     struct bfd_link_info *info;
     bfd *input_bfd;
     asection *input_section;
     bfd_byte *contents;
     Elf_Internal_Rela *relocs;
     Elf_Internal_Sym *local_syms;
     asection **local_sections;
{
  Elf_Internal_Shdr *symtab_hdr;
  struct elf_link_hash_entry **sym_hashes;
  Elf_Internal_Rela *rel;
  Elf_Internal_Rela *relend;

  symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
  sym_hashes = elf_sym_hashes (input_bfd);

  rel = relocs;
  relend = relocs + input_section->reloc_count;
  for (; rel < relend; rel++)
    {
      int r_type;
      reloc_howto_type *howto;
      long r_symndx;
      struct elf_link_hash_entry *h;
      Elf_Internal_Sym *sym;
      asection *sec;
      bfd_vma relocation;
      bfd_reloc_status_type r;

      r_type = ELF64_R_TYPE (rel->r_info);
      if (r_type < 0 || r_type >= (int) R_SPARC_max)
	{
	  bfd_set_error (bfd_error_bad_value);
	  return false;
	}
      howto = elf_sparc_howto_table + r_type;

      r_symndx = ELF64_R_SYM (rel->r_info);

      if (info->relocateable)
	{
	  /* This is a relocateable link.  We don't have to change
	     anything, unless the reloc is against a section symbol,
	     in which case we have to adjust according to where the
	     section symbol winds up in the output section.  */
	  if (r_symndx < symtab_hdr->sh_info)
	    {
	      sym = local_syms + r_symndx;
	      if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
		{
		  sec = local_sections[r_symndx];
		  rel->r_addend += sec->output_offset + sym->st_value;
		}
	    }

	  continue;
	}

      /* This is a final link.  */
      h = NULL;
      sym = NULL;
      sec = NULL;
      if (r_symndx < symtab_hdr->sh_info)
	{
	  sym = local_syms + r_symndx;
	  sec = local_sections[r_symndx];
	  relocation = (sec->output_section->vma
			+ sec->output_offset
			+ sym->st_value);
	}
      else
	{
	  h = sym_hashes[r_symndx - symtab_hdr->sh_info];
	  if (h->root.type == bfd_link_hash_defined
	      || h->root.type == bfd_link_hash_defweak)
	    {
	      sec = h->root.u.def.section;
	      relocation = (h->root.u.def.value
			    + sec->output_section->vma
			    + sec->output_offset);
	    }
	  else if (h->root.type == bfd_link_hash_undefweak)
	    relocation = 0;
	  else
	    {
	      if (! ((*info->callbacks->undefined_symbol)
		     (info, h->root.root.string, input_bfd,
		      input_section, rel->r_offset)))
		return false;
	      relocation = 0;
	    }
	}

      if (r_type != R_SPARC_WDISP16)
	r = _bfd_final_link_relocate (howto, input_bfd, input_section,
				      contents, rel->r_offset,
				      relocation, rel->r_addend);
      else
	{
	  bfd_vma x;

	  relocation += rel->r_addend;
	  relocation -= (input_section->output_section->vma
			 + input_section->output_offset);
	  relocation -= rel->r_offset;

	  x = bfd_get_32 (input_bfd, contents + rel->r_offset);
	  x |= ((((relocation >> 2) & 0xc000) << 6)
		| ((relocation >> 2) & 0x3fff));
	  bfd_put_32 (input_bfd, x, contents + rel->r_offset);

	  if ((bfd_signed_vma) relocation < - 0x40000
	      || (bfd_signed_vma) relocation > 0x3ffff)
	    r = bfd_reloc_overflow;
	  else
	    r = bfd_reloc_ok;
	}

      if (r != bfd_reloc_ok)
	{
	  switch (r)
	    {
	    default:
	    case bfd_reloc_outofrange:
	      abort ();
	    case bfd_reloc_overflow:
	      {
		const char *name;

		if (h != NULL)
		  name = h->root.root.string;
		else
		  {
		    name = (bfd_elf_string_from_elf_section
			    (input_bfd,
			     symtab_hdr->sh_link,
			     sym->st_name));
		    if (name == NULL)
		      return false;
		    if (*name == '\0')
		      name = bfd_section_name (input_bfd, sec);
		  }
		if (! ((*info->callbacks->reloc_overflow)
		       (info, name, howto->name, (bfd_vma) 0,
			input_bfd, input_section, rel->r_offset)))
		  return false;
	      }
	      break;
	    }
	}
    }

  return true;
}

/* Set the right machine number for a SPARC64 ELF file.  */

static boolean
sparc64_elf_object_p (abfd)
     bfd *abfd;
{
  return bfd_default_set_arch_mach (abfd, bfd_arch_sparc, bfd_mach_sparc_v9);
}

#define TARGET_BIG_SYM	bfd_elf64_sparc_vec
#define TARGET_BIG_NAME	"elf64-sparc"
#define ELF_ARCH	bfd_arch_sparc
#define ELF_MACHINE_CODE EM_SPARC64
#define ELF_MAXPAGESIZE 0x100000

#define elf_backend_relocate_section	sparc64_elf_relocate_section
#define elf_backend_object_p		sparc64_elf_object_p

#include "elf64-target.h"